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Scholars Portal
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Preserved
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2025-09-02
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Preserved : 1 (1-2, 3-4); 2 (, 1-2, 3, 4); 3 (, 1, 2-3, 4); 4 (, 1, 2-3, 4); 5 (, 1-2, 3, 4); 6 (, 1, 2, 3-4); 7 (, 1, 2, 3-4); 8 (, 1, 2-3, 4); 9 (, 1, 2, 3-4); 10 (, 1-2, 3-4); 11 (, 1-2, 3-4); 12 (, 1-2, 3-4); 13 (, 1-2, 3-4); 14 (, 1-2, 3-4); 15 (, 1-2, 3, 4); 16 (, 1, 2, 3-4); 17 (, 1 to 4); 18 (, 1, 2-3, 4); 19 (, 1, 2-3, 4); 20 (, 1-2, 3, 4); 21 (, 1-2, 3-4); 22 (, 1-2, 3-4); 23 (, 1-4); 24 (, 1-2, 3-4); 25 (, 1-4); 26 (, 1-2, 3-4); 27 (, 1-2, 3-4); 28 (, 1-4); 29 (, 1-4); 30 (, 1-4); 31 (, 1-2, 3-4); 32 (, 1-4); 33 (, 1-4); 34 (, 1 to 4); 35 (, 1, 2, 3-4); 36 (, 1 to 4); 37 (, 1 to 4); 38 (, 1 to 4); 39 (, 1 to 4); 40 (, 1 to 4); 41 (, 1 to 4); 42 (, 1 to 4); 43 (, 1 to 4); 44 (, 1 to 4); 45 (, 1 to 4); 46 (, 1 to 4); 47 (, 1 to 5); 48 (, 1 to 5); 49 (, 1 to 5); 50 (, 1 to 5); 51 (, 1 to 5); 52 (, 2 to 5); 53 (, 1); 1971; 1972; 1973; 1974; 1975; 1976; 1977; 1978; 1979; 1980; 1981; 1982; 1983; 1984; 1985; 1986; 1987; 1988; 1989; 1990; 1991; 1992; 1993; 1994; 1995; 1997; 1998; 1999; 2001; 2002; 2003; 2004; 2005; 2006; 2007; 2008; 2009; 2010; 2011; 2012; 2013; 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021; 2022; 2023; 2024; 2025
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Internet Archive
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Preserved
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2025-08-08
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5 to 34
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Portico
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Preserved
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2026-02-12
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Preserved : 1971: 1(1-4), 1972: 2(1-4), 1973: 3(1-4), 1974: 4(1-4), 1975: 5(1-4), 1976: 6(1-4), 1977/1978: 7(1-4), 1978/1979: 8(1-4), 1979/1980/1981: 9(1-4), 1981: 10(1-4), 1982: 11(1-4), 1982/1983: 12(1-4), 1983: 13(1-4), 1984: 14(1-4), 1985/1986: 15(1-4), 1986: 16(1-4), 1987: 17(1-4), 1988: 18(1-4), 1989: 19(1-4), 1990/1991: 20(1-4), 1991/1992: 21(1-4), 1993: 22(1-4), 1994: 23(1-4), 1994/1995: 24(1-4), 1997: 25(1-4), 1998: 26(1-4), 1999: 27(1-4), 2001: 28(1-4), 2002: 29(1-4), 2003: 30(1-4), 2003/2004: 31(1-4), 2005: 32(1-4), 2005: 33(1-4), 2006: 34(1-4), 2007: 35(1-4), 2008: 36(1-4), 2009: 37(1-4), 2010: 38(1-4), 2011: 39(1-4), 2012: 40(1-4), 2013: 41(1-4), 2014: 42(1-3), 2015: 43(1-4), 2016: 44(1-4), 2017: 45(1-4), 2018: 46(1-4), 2019: 47(1-5), 2019/2020: 48(1-5), 2021: 49(1-5), 2022: 50(1-5), 2023: 51(1-5), 2024: 52(1-3, 5), 2025: 53(1-4)
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CLOCKSS Archive
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Preserved
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2026-02-09
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1 to 53
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LOCKSS Archive
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In Progress
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2026-02-09
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40, 47
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LOCKSS Archive
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Preserved
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2026-02-09
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41 to 46
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Library of Congress
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Preserved
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2025-04-07
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46 (1 to 4); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 50 (1 to 5); 51 (1 to 5); 52 (1 to 3)
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National Digital Preservation Program, China
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Preserved
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2025-10-23
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Preserved : 3 (1); 4 (2 to 4); 5 (1 to 5); 25 (1); 26 (3); 27 (1, 3); 28 (1); 29; 31 (3); 32 (1); 33; 34 (2 to 4); 35 (1 to 3); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 51 (1 to 5); 52 (1 to 4)
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National Digital Preservation Program, China
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Preserved
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2025-12-04
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Preserved : 3 (1); 4 (2 to 4); 5 (1 to 5); 25 (1); 26 (3); 27 (1, 3); 28 (1); 29; 31 (3); 32 (1); 33; 34 (2 to 4); 35 (1 to 3); 36 (1 to 4); 37 (1 to 4); 38 (1 to 4); 39 (1 to 4); 41 (1 to 4); 42 (1 to 4); 43 (1 to 4); 44 (1 to 4); 45 (1 to 4); 46 (1 to 4); 47 (1 to 5); 48 (1 to 5); 49 (1 to 5); 51 (1 to 5); 52 (1 to 4)
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National Library of the Netherlands
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Preserved
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2024-12-15
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Preserved : 25 (1-4); 34 (2-4); 35 (1, 2, 3-4); 36 (1-4); 37 (1-4); 38 (1-4); 39 (1-4); 40 (1-4); 41 (1-4); 42 (1-4); 43 (1-4); 44 (1-4); 45 (1-4); 46 (1-4); 47 (1-4)
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